/* Reset and Base Styles */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
  width: 100%;
  max-width: 100vw;
  overflow-x: hidden;
}

body {
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  line-height: var(--leading-normal);
  color: var(--text-primary);
  background-color: var(--bg-secondary);
  transition: background-color var(--transition-normal), color var(--transition-normal);
  overflow-x: hidden;
  width: 100%;
  max-width: 100vw;
  margin: 0;
  padding: 0;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-weight: 600;
  line-height: var(--leading-tight);
  color: var(--text-primary);
}

p {
  color: var(--text-secondary);
  line-height: var(--leading-relaxed);
}

/* Links */
a {
  color: var(--primary-color);
  text-decoration: none;
  transition: var(--transition-fast);
}

a:hover {
  color: var(--primary-dark);
}

/* Buttons */
.btn {
  display: inline-block;
  padding: var(--space-base) var(--space-lg);
  border-radius: var(--radius-base);
  font-weight: 500;
  text-align: center;
  transition: var(--transition-fast);
  border: 2px solid transparent;
  cursor: pointer;
  text-decoration: none;
  font-size: var(--font-size-base);
}

.btn-primary {
  background-color: var(--primary-color);
  color: var(--button-primary-color);
  border-color: var(--primary-color);
}

.btn-primary:hover {
  background-color: var(--primary-dark);
  color: var(--button-primary-color);
  border-color: var(--primary-dark);
  font-size: var(--font-size-lg);
}

.btn-secondary {
  background-color: transparent;
  color: white;
  border-color: white;
}

.btn-secondary:hover {
  background-color: white;
  color: var(--primary-color);
  border-color: white;
}

/* Navigation */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border-color);
  transition: var(--transition-normal);
}

[data-theme="dark"] .navbar {
  background: rgba(15, 23, 42, 0.95);
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--container-padding);
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 4rem;
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: var(--gap-sm);
}

.logo {
  height: var(--space-xl);
  width: auto;
}

.brand-text {
  font-size: var(--font-size-lg);
  font-weight: 600;
  color: var(--text-primary);
}

.nav-menu {
  display: flex;
  list-style: none;
  gap: var(--gap-xl);
  margin: 0;
  padding: 0;
  align-items: center;
  justify-content: center;
  flex: 1;
}

.nav-item {
  display: flex;
  align-items: center;
}

.nav-link {
  color: var(--text-secondary);
  text-decoration: none;
  font-weight: 500;
  position: relative;
  transition: color var(--transition-normal);
  padding: 0.5rem 0;
}

.nav-link:hover,
.nav-link.active {
  color: var(--primary-color);
}

.nav-link::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: 0.25rem;
  width: 100%;
  height: 2px;
  background-color: var(--primary-color);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition-fast);
  border-radius: 1px;
}

.nav-link:hover::after,
.nav-link.active::after {
  transform: scaleX(1);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.theme-toggle {
  background: none;
  border: none;
  color: var(--text-secondary);
  cursor: pointer;
  padding: 0.5rem;
  border-radius: 0.375rem;
  transition: var(--transition-fast);
  display: flex;
  align-items: center;
  justify-content: center;
}

.theme-toggle:hover {
  color: var(--primary-color);
  background-color: var(--bg-tertiary);
}

.theme-icon {
  width: 1.25rem;
  height: 1.25rem;
}

.theme-icon-sun {
  display: none;
}

.theme-icon-moon {
  display: block;
}

[data-theme="dark"] .theme-icon-sun {
  display: block;
}

[data-theme="dark"] .theme-icon-moon {
  display: none;
}

.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.25rem;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  width: 2.5rem;
  height: 2.5rem;
  position: relative;
  border-radius: 0.375rem;
  transition: var(--transition-fast);
}

.nav-toggle:hover {
  background-color: var(--bg-tertiary);
}

.hamburger {
  display: block;
  width: 1.5rem;
  height: 2px;
  background-color: var(--text-primary);
  position: relative;
  transition: all var(--transition-normal);
  border-radius: 1px;
}

.hamburger::before,
.hamburger::after {
  content: '';
  position: absolute;
  left: 0;
  width: 1.5rem;
  height: 2px;
  background-color: var(--text-primary);
  transition: all var(--transition-normal);
  border-radius: 1px;
}

.hamburger::before {
  top: -0.5rem;
}

.hamburger::after {
  top: 0.5rem;
}

.nav-toggle.active .hamburger {
  background-color: transparent;
}

.nav-toggle.active .hamburger::before {
  top: 0;
  transform: rotate(45deg);
}

.nav-toggle.active .hamburger::after {
  top: 0;
  transform: rotate(-45deg);
}

/* Footer */
.footer {
  background-color: var(--bg-primary);
  border-top: 1px solid var(--border-color);
  padding: var(--space-3xl) 0 var(--space-xl);
}

.footer .container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--container-padding);
}

.footer-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 2rem;
  margin-bottom: 2rem;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.footer-brand .logo {
  height: 2rem;
  width: auto;
}

.footer-brand .brand-text {
  font-size: var(--font-size-lg);
  font-weight: 600;
  color: var(--text-primary);
}

.footer-links {
  display: flex;
  gap: 2rem;
  flex-wrap: wrap;
}

.footer-links a {
  color: var(--text-secondary);
  transition: var(--transition-fast);
  text-decoration: none;
}

.footer-links a:hover {
  color: var(--primary-color);
}

.footer-social .social-link svg {
  vertical-align: middle;
}

.footer-bottom {
  border-top: 1px solid var(--border-color);
  padding-top: 2rem;
  text-align: center;
}

.footer-bottom p {
  color: var(--text-secondary);
  margin: 0;
}

/* Medium screens - reduce spacing */
@media (max-width: 1200px) {
  .nav-menu {
    gap: var(--gap-lg);
  }
}

@media (max-width: 1024px) {
  .nav-menu {
    gap: var(--gap-lg);
  }
  
  .nav-link {
    font-size: var(--font-size-sm);
    padding: 0.375rem 0;
  }
}

/* Responsive navigation */
@media (max-width: 850px) {
  .nav-menu {
    position: fixed;
    top: 4rem;
    left: 0;
    right: 0;
    background: var(--bg-card);
    flex-direction: column;
    padding: 2rem;
    box-shadow: var(--shadow-lg);
    border-top: 1px solid var(--border-color);
    transform: translateY(-100%);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
    z-index: 998;
    gap: 1.5rem;
  }

  .nav-menu.active {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }

  .nav-toggle {
    display: flex;
    border: none;
  }

  .nav-actions {
    order: 1;
  }

  .theme-toggle {
    width: 2.25rem;
    height: 2.25rem;
  }



  /* Footer responsive styles */
  .footer-content {
    flex-direction: column;
    text-align: center;
    gap: 1.5rem;
  }

  .footer-links {
    flex-direction: column;
    gap: 1rem;
  }

  .footer-brand {
    justify-content: center;
  }
}

/* Accessibility - Reduced Motion */
@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  
  html {
    scroll-behavior: auto;
  }
}

/* Focus Styles for Accessibility */
button:focus,
input:focus,
textarea:focus {
  outline: 2px solid var(--primary-color);
  outline-offset: 2px;
}

/* Navigation Link Focus Visible */
.nav-link:focus-visible {
  outline: 2px solid var(--primary-color);
  outline-offset: 2px;
  border-radius: 2px;
}

/* High Contrast Mode Support */
@media (prefers-contrast: high) {
  :root {
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.8);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.8), 0 2px 4px -2px rgb(0 0 0 / 0.8);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.8), 0 4px 6px -4px rgb(0 0 0 / 0.8);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.8), 0 8px 10px -6px rgb(0 0 0 / 0.8);
  }
}

/* Print Styles */
@media print {
  .theme-toggle,
  .nav-toggle,
  .navbar {
    display: none;
  }
  
  .hero {
    min-height: auto;
    padding: 2rem 0;
  }
  
  .section {
    padding: 1rem 0;
  }
  
  * {
    box-shadow: none !important;
  }
}